Fuel-supply device



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Oct. 13, 1925. 1,557,206

0. F. KETTERING FUEL SUPPLY DEVICE Original Filed se t. 23, 1918 a Sheets-Sheet 2 f? 78 I 5 g 4 2 m -i I. Q @vg '76 77 ///I 7 L:

- Gull Oct. 13, 1925. 1,557,206

C. F: KETTERING' FUEL SUPPLY DEVICE Original Filed Sept. 23, 1918 s Shets-Sheet 5 [Xi/1755555 fiYL/EJY/UP W ZZZ/242F155 fifr'zfarm Patented Oct. 13, 1325.

UNITED, STAT cniinnns F. KETTERING, or Darren, enro assrcnon 'ro DELCO-LIGHT comraNY, or

DAYTON, care, a comonarrorr or DELAWARE.

rum-SUPPLY DEVICE. 7

Original application filed September 23, 1918, Serial No. 255,294. Divided and this application filed March 13; was.

To all whom it may, concern: i

Be it known that I, CHARLES. F. KETTER- ING, a citizenof the United States of America, residing at Dayton, county of Montgomery, and State of Ohio, have invented certain new and useful Improvements in Fuel-Supply Devices, of which the following is a full, clear, and exact descriptlon.

This invention relates to devices for supplying fuel to internal combustion engines and thelike. C V

- The present application is a division 0t my co-pending application Serial No. 255,- 294-, filed September 23, 1918, Patent No.

. 1,410,682, dated March 28, 1922.

One of the objects of the invention is to provide electrically operated means con I, trolled byfthe 'operation of the engine for 1 causing thedelivery of fuel from a source of 29 supplyto-a fuel reservoir from whence the fuel is sucked directly into'the engine at each intake strokethereof. One manner f carrying out this object consists in providving an eleotro-magnetic fuel ump 1ncludmg a magnet" which is energ zed intermittently with the operation.- of'the engine A further object of the invention is to provide an electro-magnetic fuel pump having'a plurality of .electro-magnet circuits controlled byan engine-operated interrupter -which latter also controls the engine ignition circuit.

Further objects and advantages of the present invention will be apparent from the following description, reference being made to the accompanying drawing, wherein cerinvention are tain embodiments of the. shown. I

Referring to the drawingsi Fig. 1 is an end view oi an internal conibustion engine showing the present invention applied thereto, together with a wiringdiagram of certain electrical devices associated with the engine. l

c Fig. 2 is a sectional view showing on an i enlarged scale the fuel supply and controlling devices shown in Fig. 1.

Fig. 8' is a sectional view taken on line 33 showing the throttle valve.

Fig. t is a view taken on the line 4-4 of 2, showing" the valve for controlling the admission of air. I

Fig. 5 is a sectional view of aw-modified form of the invention together with a wir- Serial to. 543,200.

ing diagram of electrical devices associated with this form of the invention and with the enginewith which the invention is associated.

Referring to Fig. 1, 2O designates an internal combustion engine provided with a fly-wheel 21 ,which cooperates with the cyl inder, not shown. Said engine 20 is provlded with a breather 22, which is connected at. the lower end with a crank case 23, and the ,upper'end with the fuel supply device 50, to be described. Said device is connected with the intake pipe 24 of the engine. As* will be explained later, the breather 22 and the member 50 provide passages from I i the interior of the crank case and from the outside atmosphere to the engine intake.

The flywheel 21 is provided with a pulley 25 which is connected by means of a belt 26 -with the armature 27 of the generator 28.

In general practice, it is usual to connect the armaturefdirectly with the crank shaft of the engine, but the belt connection is shown merely for purposes of illustration. The armature 27 is connected by-wires 29 and 30 with the storage battery31, and the shunt field winding 32 is connected across the wires 29 and 30. Wire 29 is connected by .wire 33 with timer contact 35. Timer contact 34 which cooperates with timer con i bymeans of a timercam'43 which is con nected to the engine crankshaft by-gear not shown. I v Y 7 Referring to 2,50 indicates as a whole, a unitary structure comprising members 51, 5 2 and 53 which'may be formed of cast metal and suitably joined together, forming a single structure. The-breather 22 is'provided with inner andputer shells 1 22 and 22". vThe inner shell 22? isconnected directly with the crank case of the engine and leads into a passage 54:, formed in the member 51. The shell 22 surrounds the shell 22 and tormsapassage which com-- municates" with the outside atmosphere ing 55. Thus it will be seen that air may.

be permitted to enter the passage 54; from the outside air and the crank case. The particular construction and operation of the breather forms no part of the present invention, but is' described and claimed in my Patent No. 1,380,974, dated June 7 1921. The member 51 is provided with a valve seat 56 having ports 57. A flat valve 58 having ports 59 is pivotally mounted upon the valve seat 56 by means of screw 60.

The member 52 is provided with a passage 61which forms a continuation of the passage 54, and said passage 61 leads up v wardly to a restricted passage 62 which flares outwardly into a larger passage 63 which forms a mixing chamber in which the fuel charge is mixed'with the air entering the passage 61. The member 52 is provided with a chamber 64 which will be known as the fuel reservoir. The bottom of wall 65 of the reservoir 64 is provided with a downwardly'projecting post 66, around which is placed a solenoid magnet 67. One terminal of magnet 67 is connected by wire 68 with wire 38, and the other terminal is connected by the wire 69 with wire .36. The post 66 is bored out centrally to form a passage 70 which extends into a recess 71 formed in. the bottom wall65 of the reservoir 64, A valve 72 having a notched flange is located within the recess and is yieldin ly .held in position by means of a spring 3 interposed between the valve 72 and a plug 74 mountedin the upper wall 75 of the reservoir 64. The pump intake pipe 76 is secured upon .the lower end of the post 66 and serves to support a plate 77 of non-magnetic material, upon which the magnet 67 rests. The member 52*is made of magnetic material and the .pipe 76 of nonmagnetic material. A solenoid armature 78 acting as a pump displacement member, is

mounted to slide up and down within the pipe 76 which serves as the pump cylinder. Said armature 78 is bored out centrally to form a passage 79, and a spring 80 is interposed between a'shoulder 81 formed in the post 66, and a shoulder 82 formed within the armature 78. This spring 80 serves to yieldingly maintain the I armature in the downward position, as shown in Fig. 2, A ball check valve 83 located in the passage 79 serves normally to maintain 'said passage closed. The pipe 76 is connected with an oil filter 84, and the pipe 85 connects the oil filter with an oiltank 86,..which serves as the source of fuel for'the engine. The reservoir 64 is provided with an overflow passage 87, which is connected by means of pipe 88 with the tank 86. A portion of the reservoir 64 extends across the passage 61, in order to form the restricted passage 62. A plug 89 having passages 90 and 91 provides a removable connection between the fuel reservoir and the mixing chamber 63. By securing the plug in the manner shown, it can be readily removed so that the passages may be easily cleaned.

The casting member 52 is provided with an outwardly extending apron 95 which provides a housing 96 for a solenoid magnet 97. The'bottom of the housing 96 is closed by a plate 98 of non-magnetic material, provided with a central aperture 99 through which slides asolenoid armature 100. One terminal of the magnet 96 is connected by means of a wire 109 with wire 38, and the other terminal by means of wire 110 with wire 29.

The casting member 53. is provided with a circular recess 101 in which is located a valve seat 102 which is provided with ports 103, which are segmental in shape. A valve 104 which is attached to the armature 100 is provided with segmental ports 105, and

is located in the recess 101 and cooperates with the valve seat 102. The member 53 is provided with an auxiliary air valve 106, which is yieldingly maintained against a valve seat 107 by means of a spring 108. Valve 106 is located between valve 104 and the engine, so that the control. of the air admitted by valve 106 will not he modified coil winding 37, wire 38, back to the wire 30. The coil 37 will be energized, and cre ate a magnetic field in the region of the secondary winding 39. The closing ofthe contacts 34 and 35 will also eifect the energizing of the solenoid magnet 67, thereby causing the armature 78 to be attracted.

Y tact 34, contact 35, wire 36, primary ignition Each revolution of cam 43 will effect theseparation of contacts 34 and 35,'thereby causingan interruption of the flow to the primary winding 37 in order to create a sparkin impulse in the secondary winding 39, Wlllfil' is transmitted by wire 41 to the spark plug 42. -The separation of the contacts 34 and 35 will-also interrupt the flow of current tothe magnet 67, andthe same will be demagnetized. When this occurs the spring 80 will force the armature 78 into the lowermost position, as viewed in Fig. 2. Thus'it'will be seen that for every revolution of the cam 43. the solenoid armature 78 will move up and down. The upward movement of the armature 78 will cause any liquid which is contained in the passages 70 and 7 9 to be moved upwardly, and the pressure of the said liquid will maintain the valve natmoa 83 in position on its seat and will liftthe valve 72 02, its seat and cause some of the liquid to flow into the reservoir 64.

Upon the downward movement of the arma ture 79, the valve 72 will return to its seated position and the ball valve 83 will be lifted to permit more liquid to enter the passages 70 and 79. Thus it will be seen that the up and down movement of the armature 7 8.wi1l' cause fuel .to'be pumped from the supply tank 86 to the fuel reser-- voir 6 1. I

As the engine operates, due to the pumping action of the piston, air willbe drawn into the breather through the holes 22 and the passage 55, where itwill be mixed with gaseous matter whichmay be drawn out of the crank case through the breather, 22". This air will pass'up'w'a'rdly from the passage 61 and the passage 62, and at a point where the passage 62 flares out into the mixing chamber 63, a sucking action will be produced by the air as it rushes pastthe passages 91, thereby causing fuel to rise from the reservoir 64' up through the passage 90, and toflow out through the passages 91. This fuel will mix with the air in the mixing chamber 63 and will flow out through the openings 103 and 105, formed in the valve seat 102 andthe valve 104:, and into the intake 24 of the engine.

When the speed of the engine exceeds a certain amount .the voltage between the wires 29 and 30 will exceed a certain value, and the magnet 96w'ill be energized sufficiently to begin to draw up the armature 100, thereby causing the valve 104 to move with relation to the valveseat 102, so as to begin to close the passage for the fuel into the engine. As the engine tends to rotate faster, the voltage will increase still furthcr and cause the 'valve104 to cut down the V supply of fuel to the engine, and thus cause I There has been provided the engine to decrease in speed. The auxiliaryvalve 106 also has a governing efi'ect by opening at a predetermlned engine speed and cut down the richness of the fuel mixture. The amount of air entering the-pas.

sa e 61 is determined valve 58.

Thus it will be seen in the foregoing description that there has been provided an electrically operated fuel pump of very simple construction, the movements of which are controlled by the action of the engine so that the fuel is pumped up from the source of supply when the engine is running, and only sufficient quantities are retained in the by the position of the.

reservoir to supply the engine with the re-, of fuel, according to the' quired amount speed at which the ,engineis running. a unitary structure which includes the pump-and a carburetor or mixing. chamber, and an automatic throttle valve controlled by the operation of the terial provided with a recess 132.

Referring to Fig. ,5, showing a modified form of the invention, a hollow sleeve 120 of.

nonmagnetic material has screw threaded engagement with the lower wall 65 of the reservoir 64.- Thefl'ower end of sleeve 120 supports a plate 120 of magnetic material,

and issecured to the fuel intake pipe 76. A solenoid magnet 121 surrounds the upper end of the sleeve 120. One terminal of said magnet 121 is connected by wire 122 with wire 29, and the other terminal is connected by wire 123 with a switch con act 124, which cooperates with switch contact 125. Contact 125 is connected by Wire 126 to wire 30. A second solenoid magnet 127 surrounds the lower end of the sleeve 120 and one terminal of said magnet 127 is connected by wire 128 with wire 36, and the other terminal is connected by wire 129 with wire 38 Within the upper end of the sleeve 120 is placed a hollow plug 130 of magnetic material, and within the lower end of the-sleeve 120, is placed a hollow plug 131 of magneticma- The space in the sleeve 120, between 131 serves as a pump cylinder and is artially occupied by an armature 133, w ich "the washers 134: and 135 is less than the the lower end: of the plug 130 and the upper end of the plug serves as a displacement member. Washe'rs distance between the plugs 130 and 131,

thereby permitting a certaln amount of up and down movement of thearmature 133. Said armature 133 is provided with a recess 136 in which is located a valve 137, similar in construction to valve 72. Valve 137 is yieldingly maintained in position by means of a spring 138, interposed between said valve 137 and the washer 134. The armature 133. is provided with a recess 139 in which is located one end of the spring PLO-which serves normally to maintain a valve 141, similar to valve 137, within the recess 132 of the plug 131. In this form of the invention,

the timer is provided with an extra set of contacts=124 and 1125, as shdwn in Fig. 5, when the-cam143 perinits the engagement of the contacts- 124 and 125, current will flow through wire 126 across contacts 125 and 124 to wire 123 to magnet 121 and back through wire 122 to the-wire 29. a When this occurs the. magnet 121 will be energized, thereby attracting the armature 133, causing the same to moveto the position shown in Fig. 5. When'this occurs, any fuel which is located above the valve 137 will be elevated and the valve 141 willbe lifted from its seat. tacts 124mm 125 will-be caused to separate As the cam 43 .rotates the connet 127 will also be energize ing the elevation of a certain amount of i When this occurs the ignitioncoil will be energized in the usual manner andthe magto effect the downward movement of the armature 133. When this movement takes place the valve 141 will be maintainedon its seat, and the valve 137 will be moved away from its seat, due to the displacement of liquid by the downward movement of the armature 133. The Washers of non-magnetic material 134 and 135 serve to maintain a gaplbetween the armature 133 and the cores 130 and 131, in either position of said armature. Thus it will be seen that for each rotation'of the cam 143, an up and down movement will be imparted to the armature 133, thereby causliquid from'the 'fuel supply tank 86 to the reservoir 64:. The pumping action of the engine will cause air to pass through passages 161, 162 and 163; and, at the juncture of the passages 162 and 163, fuel will be drawn out through the small hole 150, which connects with the passage 151 leading to the reservoir 64. A by-pass 155 is provided so I that a-certain quantity of air may be taken in passing the valve 104, without passing through the mixing chamber 163.

While the formbf mechanism herein shown and described constitutes a preferred embodiment of one form of the invention, it isto be understood that other forms might be adopted and various changes and alterations made in shape, size,.and."proportionof the elements therein without departing from the spirit and scope of the invention.

I magnetic pum What I claim is as follows:

1-. In a device of the character described, the combination with an engine; of electromeans for lifting li uid to a higher leve camprising a plum ity of electromagnet circuits; and means actuated by-theengine for successively energizing said circuits.

2. In a device of the character described, the combination with an engine; of electromagnetic pump means for liftin liquid to a higher level comprising a piirality of 'electromagnet circuits; and means actuated by the engine for intermittently energizing.

said circuits.

'3. In a device of the character described, the'combination with an engine having 1gnition means, of electro-magnet pumping means for lifting fuel comprising aa plurality of electro-magnet circuits, switch means in said circuits, and means responsive to the;

controlled by the engine, said ignition means being controlled by one of said switch 5. In a device of the character described, the combination with an engine having ignition means; of electromagnetic pumping means comprising an electromagnet circuit; of engine operated means for simultaneously actuating said circuit and said ignition me'ans'pand a second electromagnet cir-, cult controlled by said engine operated means independently of the engine ignition means. i

6. In adevice ofthe character described, the combinationwith an engine having ignition means; of electromagnetic pumping meanscomprising a plurality of electro-- magnet circuits; and engine operated means for intermittently energizing said circuits and for controlling said lgnition means.

7 In a device of the character described, the combination with an engine; of a d namo-electric machine connected therewit of an electrically operated fuel pump for supplying fuel to the engine; and a commonsource of current for supplying current to the dynamo-electric machine and the electrically operated fuel pump. i.

8. In adevice of the character described, the combination with an engine; of a1 ,dyname-electric machine connected therewith; of an electrically'operated fuel pump for supplying fuel to the engine; anda common source of current for simultaneously supplying current to the dynamo-electric machine and the electrically operated fuel 9. In a device of the character described,

the combination with an engine; of a d ,namo-electric machineconnected therewit of a battery in circuit-with said dynamoelectric machine; of-an electrically operated,

fuel pump-for supplying-fuel to the engine;

and means for connecting said fuel pump with said circuit. v

In testimony whereof I hereto affix my signature.

CHARLES F. KETTERING. 

